Download Yealink SIP-T28 User guide
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Enterprise IP Phone Using the Advanced Phone Functions Using the Advanced Phone Functions Account Setting Please refer to the previous part “Configuration and Registration” for the basic Account setting information. The following table lists the instruction of the field about the advanced Account Setting. Field Name Description UDP Message Keep-alive Defines whether to active the phone mechanism. The default is Enabled. UDP Interval Keep-alive This parameter specifies how often the phone will send a packet to the SIP server. Default is 30 seconds. UDP Keep-alive Login Expire This parameter specifies the time frequency that phone refreshes its registration. The default interval is 3600 seconds. Local SIP Port Local SIP port. The default value is 5060. Local RTP Port Defines the local RTP port that the phone will listen and transmit. The default value is 11780. RPort The parameter allows you configuring the proxy to send responses back to a particular address and port. The default is disabled. SIP Session Timer This document defines an extension to the Session Initiation Protocol (SIP). This extension allows for a periodic refresh of SIP sessions through a re-INVITE or UPDATE request. The refresh allows both user agents and proxies to determine if the SIP session is still active. Subscribe Period This parameter could set the period of the subscription. The default value is 3600. DTMF Type Select the DTMF type. You can only configure these settings via Web interface. 1) Choose Account. 2) Select the desired account. 3) Choose Advanced to do the relating settings. You can consult your system administrator for more information. - 32 -